Make it easy to turn off auto-upload from the start
For my purposes I explicitly do not want to upload photos from my mobile devices. I only want to be able to view/edit what's currently on my account. When I downloaded the iOS app, I thought I disabled auto-upload during the setup, but it forced me to enable access to local photos before I could continue. Upon completing setup it began to upload my iPhone library.
This is definitely something I'd like to make possible to completely disable. I want to use this site solely for my "better" shots and not my everyday pics.